Milling and marking machine



Aug. 14, 1945. E T NORD MILLING AND MARKING MACHINE' Filed Julyze, 194s6 sheets-sheet 1 Aug, 1,4,- 1945. 4E T VNoRD MILLING AND MARKING MACHINEFiled July 2s, 194:5

6 lSheets-Sheet 2 All@ 14, 1945- E. T. NoRD v Y DMJILIING' AND MARKINGMACHINE Filed July 26, 143 6 sheets-sheet :5

www ,A Trnn/sys Aug. 14, 1945.*` T, NQRD '2,381,921

` MILLINQ AND MARKING MACHINE i Filed July 2e, 1943 '6. sheets-sheet 4Auge 14,

E. T. NORDv MILLING AND MARKING MACI-INE Filed-July 2e, 1945Yeshets-sheet 5 Patented Aug. 14, 1945 MILLING AND MARKING MACHINE g EricT.`Nord, Amherst, Ohio, assignor'to U. S.

Automatic Corporation, Amherst, Ohio, a cory poration of OhioApplication July 26, 1943, seria1`N0..496,169

A (c1. ers-38) 7 Claims.

The invention relates to a milling and marking machine, andparticularlyto apparatus of this character adapted automatically to effect certainmilling c-uts simultaneously on a plurality of small work pieces and,also, during a cycle of operations, to mark the pieces withclassification or identifying indicia, and eject the finished piecesfrom the machine. The entire cycle of operations is automatic with theexception of the initial feeding of the work pieces into certain workholders forming part of the machine.

The invention is particularly illustrated in the following descriptionand accompanying drawings as applied to the milling and markingv oftubular end-flanged articles known as lprimer bodies.

The annexed drawings and the following description set forth in detailcertain means illustrating the improved milling and marking machine,such means constituting, however, only one of the various forms in whichthe principle-of the invention maybe embodied.

In said annexed drawings:

Figure 1 is a front elevation of the improved milling and markingmachine; y

Figure 2 is a fragmentary plan view, upon an enlarged scale,particularly showing three'of a bank of laterally ali-gned work piecesbeing subjected to a second of two certain consecutive millingoperations, the View showing certain milling cutters in section andindicating a certain rotatable drum and work holders secured thereto inwhich the pieces are held during the operations eiected thereon, thesecond milling operationY indicated beingsubstantially completed, thisView being taken from the plane indicated by the line 2--2, Figure 1;

`Figure 3 is a fragmentary transverse Vertical section, taken in theplane indicated by theline 3 3, Figure 2;

Figure 4 is an end view of one of the work pieces after the completeoperations of milling and marking have beeneffected thereon; f

Figure 5 is a side elevation of the work piece shown in Figure 4;

Figure 6 isa right side elevation of the milling showing, however,several of the elementsin positions respectively different from thoseshown in Figure 14, as will be hereinafter fully explained;

Figure 8a is an end view of one of the plungers shown in Figure8,\particularly illustrating the indicia upon rthe markingy or die faceof the plunger;

Figure 9 is a fragmentary vertical longitudinal ',section, taken fromthe plane indicated by the line 9-9, Figure 8;..

Figure 10 is a left side elevation of the milling and marking machine,taken from the plane indicated by the line Ill-I0, Figures 1 and 12;

Figure 11 is a fragmentaryfvertical longitudinal section, taken fromtheplanes indicated by the line lI-Il, Figures 1 and 12, and showingcertain elements illustrated in Figure 10, this View showing theseelements in positions respectively 'different from those shown in Figure10;

Figure 141s 'a vertical longitudinal section of the complete milling andmarking machine, taken from the` planes indicated by the line lill- 14,Figures 1 and.1 2;

Figure 15l is a fragmentary transverse vertical section, taken from theplanes indicated by the line I5- -|5, Figures 14 and 16;

Figuregl is a fragmentary showing of certain elements appearing inFigure 14, particularly illustrating the marking position of one of thespring-actuated plungers which is indicated in Figure 14 in itsretracted position, the work piece being-marked and the work holder anda fragment of the rotatable drum to which .the holder is secured beingalso shown in this View;

Figure 17 is a plan section of the complete milling and markingmachine,taken from the planes indicated by the line I'l-ll, Figures 6, 10, and14; and

Figure 18 is a plan section of the complete milling and marking machine,taken from vthe planes indicated by the line l 8--|8, Figures 6, 10, and14. Referring to the annexed drawings in which the .same parts areindicated by the same respective kmembers in the several views, the mainframe of the improved milling and marking machine includes opposed sideplates l erected upon a base 2. Supported by a bracket 3 pivotallymounted on a transverse shaft 4 supported in the upper portion of theside plates I at the rear ofthe machine is a motor 5, and supported onthe lower portion of the left side plate I at the rearvof the machine isa motor 20. The motor 5 actua-tes a plurality of rotatable spindles 1,Figures 1, 6, '7, and 12, to effect the desired milling operations andthe motor actuates a cam shaft 25, Figures 1, 6, 10, 14, and 18, towhich are secured on the left side of the machine a lever 52, Figure 10,for effecting certain indexing movements of a drum 50 upon which theworkpieces I0 are mounted; and a cam for controlling the locking of the drum50 between indexing movements thereof; a cam 35, Figures 1, 6, lla., and18, upon the right side of the machine for effecting transverse imovements of the rotatable milling spindles 1; a

The rotatable drum 50 in which the Work pieces I0 are mounted while themilling and marking operations are effected thereon, and which makes onecomplete rotation While the cam shaft 25 is making four rotations, isformed in its outer surface with four plane surfaced recesses 50',Figures 1, 3, and 14, each adjacent two of which are a quadrant apart,in each of Which recesses is secured by screws H9 a series oftransversely aligned plates 55, five plates 55 to a series, each plate55 forming a Work holder and havingv a cylindrical hole 56 therethroughaligned with a hole 502 through the adjacent portion of the drum 5whereby a Work piece l0, Figures 2 and 3, can be inserted in said holeswith its inner end extended into the interior of the drum 50 and aflange I 0' formed on its outer end and limiting its inner movementlying flush at the inner face of the flange with the outer face .of theWorkholding plate 55, Figures 3 and 14. vIn order that a freely rotatingejecting tube 28, hereinafter more fully mentioned, shall not roll uponthe inner ends of the work piece I0, the plates 55, Figures 3 and 14,are formed with inwardly-extending extensions seated in the holes 502and having inner-end holes 56 through which extend end-anged knock-outpins 3l provided inwardly of the plate extensions with transverseretaining pins 32.

Before describing further detail of the machine assembly, the sequenceof operations will be outlined to wit: i

A complete cycle of operations comprises the manual lling of one bank ofwork holders 55 with work pieces l0, a milling of the Work pieces l0upon diametrically opposed portions of the flanges l0 thereof, asindicated by the milling 55, another bank is being milled, and a thirdbank is being marked, These operations are effected between indexingmovements of the drum 50 and While the latter is stationary. Theejection of the completed work pieces l0 is effected during an indexingmovement of the drum 50.

After the various operations have been completedon the several banks ofwork pieces I0, a certain spring-actuated drum-holding plunger |08,Figure 11, is retracted to permit the fourth indexing ninety degreeAmovement of the drum 50 to complete a cycle of its movements. Thedrum-holding plunger l08is retracted four times during a complete cycle,i. e., during one ccmpleterotation of the drum 50, and the latter isindexed 90 during eachsuch retraction, i. e., to move each bank of thework holders 55 from one station to the next respective station, whichstations will now be particularly described. The fourth indexingmovement of the drum carries that bank of Work holders A55 securedthereto shown' at the bottom in Figures 1 and 14, to a position at thefront end of the machine. This front position of the Work holders 55 isdesignated station A, Figure 14, and is the position in which a freshbatch of work pieces I0 is loaded manually into a bank of Work holders55. Of course, if the operation of the machine is just being started,station A would indicate the position for the start of the first cycle.But, assuming the machine has been previously started, the work holders55, a quadrant in advance of those shown in elevation in Figure 1, areon the top of the drum 50 and are loaded with work pieces I0 whicharebeing milled. This position is designated as station B, Figures 1 and14. The Work holders 55, 180 in advance of those shown in ele- Vation inFigure 1, and also loaded with Work cuts Il, Figures 2, 3, 4, and 5,astamping of pieces l0, are at the rear of the drum 50 shown in Figuresl and 14 and diametrically opposed to the work rholders shown at stationA in elevation in Figure 1. This position is designated station C and isthe station at which the work pieces I0 are marked and is particularlyshown in Figures 14 and 16. The work holders 55 a quadrant to the rearof the work holders 55 at station A shown in elevation in Figure 1 areat the bottom of the drum, indicated at station D, and in moving to thisbottom position there has been ejected therefrom, as illustrated inFigure 14, the Work piecesy I0 which have been milled and marked atstations B and C, respectively. These several operations comprise acomplete cycle of operations.

Various portions or cooperative assemblies of the machine Will now bedescribed.

The detail of the drive by which the cam shaft 25 is actuated from themotor 20 comprises, Figurcs 10, 14, and 18, a sprocket 15 s ecured tothe shaft 2| extended from the casing of the motor 20 and engaged by achain 16 which also engages a sprocket 11 'secured to and adjacent oneend of a longitudinal shaft I8 to Whose other end is secured a gear 19engaging a gear 80 secured to and adjacent one end of a parallellongitudinal shaft 8l adjacent whose other end is secured a worm 82engaging a Worm wheel 46 secured to the cam shaft 25.

The detail by which the rotatable spindles l', in whose lower endsdepending milling cutters 8 are secured, are driven from the motor 5,Figures 1, 6, 7, 10, 12, 13, and 14, comprises a pulley 86 secured tothe shaft 6 extended from the casing of the motor 5 and engaged byalongitudinallyextended belt 81 which also engages a pulley 00vrespective two end work pieces |9.

secured" adjacent the top of 7a vertical shaft 89 ltolwhichisalsosecuredl'adjacent its bottom end a sprocket 99 engaged by a chain 9|which also engages a'pairfof transversely spaced sprockets y92,'Figures1 and12, the chain 9| between the sprocket'99 and thesprockets 92 also engaging an idler take-up sprocket 94, rotatablymounted upon a pin 96 mounted in a bracket 91- slidable on `a transversetop frame memberA 33 extended between the side plates l. j vThesprockets 92 are secured totwo of the rotatable spindles 1, the secondand fourth', reading from the left, Figure 112'."TV There are six ofthese rspindles l. Each of these spindles 1 is provided with agear"93rotatably Xed thereto adjacently below the hori- Zontal plane of thesprockets 92, Figure 7, and each adjacent two of these gears 93 arerotatably engagcdjsothat all six of therotatable spindles 1are'rotatedfrom vthe two sprockets 92. It mayA be stated, that rthereason for having six rotatable spindles'll'for milling a bankY of livework pieces |9 is that the work pieces |9 are each milled -upondiametrically opposite portions of thex flanges I9' thereof and themillingA of any one work piece I is effected by an adjacent two of themilling cutters 8 which, between consecutive milling operations, areshifted laterally of the machine a distance substantially equal to thedistance between the milled recesses of adjacent work pieces I9, so thatthe intermediate four :1 milling cutters each performs two millingoperations.` one each upon two adjacent work pieces I9, and the twov endmilling lcutters 8 each` performs one milling operation, and thatoperation isupon the outside of the two respectively adjacent end workpieces I9, the outside milling cutters 8 running idle while the millingoperations are being effected vupon the inside portions of the Thisaction will be clearly seen in Figure 1 in which the righthand'endvmilling cutter 8 is running idly while theother've milling cutters 8are effecting milling'operations rupon the left sides of the fiverespective work pieces I9. 'Ihe milling cutters 8 run continuouslyduring the operation of the machine, being spaced about midway vbetweenmilling positions during the indexing movements of the drum 59, ashereinafter fully explained.

The detail by which the indexing of the drum 59 is eected comprises,Figures 1, 10, 11, and 12, transversely opposed spaced disks 53 and lillwhich, Figures land 12,-are secured adjacently exterior ofthe left-handside plate I tothe transverse shaftl to which the -drum 59 is secured,

' of which disks 53 and |9| the disk 53 is the outer one and is formedwith four obliquely arranged slots 53 which pass entirely through kthebody ,of the disk 53, and whose outer ends are 4open at the periphery ofthe disk 53, theaxes of these slots 53' attheseouter ends being vaquadrant apart. These slots 53,' areadapted to receive a roller 54rotatably mounted upon a pin |99 mounted in the outer end of anactuatingarm 52 whose inner end is secured to the cam shaft 25.@ The pressure ofthe roller Stupon the walls of lthe slots. 53 elects the indexingmovements of the drum`59. n The positionsof thearm 52 and the slots 53just immediately preceding the movement of the roller 54 into theperipheral opening of the left-hand slot V53' is indicated in Figure 10,as also the position of acertain spring-l actuated `holding plunger |98which, in cooperaltionr with-the" disk |9|, insures the fixed positionofv the dru'niv 59 between indexing movements thereof.- The disk |9| isformed with lfour pethe Aspring-actuatedv holding plunger |98 isindicated in Figure 11, which is a view of a slightly advanced positioncompared with that shown in Figure 10,'and is a View of the indexingposition when theroller 54 is engaging the left-'hand slot 53fand ridingtherein to turn the-disk 53 and hence the shaft 5|and hence vthe drum 59vto effect the'inclexing movement. Retractiono'th f spring-actuatedholding plunger |98 from the adjacent slot |9| of the pair of slots |9|axially aligned therewith-iseilected by' the extended portion 39' of the'cam 30 and takes place concurrently 'with-the `movement of the arm 52toa position whereit is about to enter a'slot y53. The connectionbetween the camportion -38' vand the plunger [D8-comprises a roller |92rotatably mounted'upon a pin |93 at the free endv of onek arm 94 of abell crank lever and engaging the cam 39, the bell crank lever beingpivotally mounted on a pin |95, the other arm |96 of the bell cranklever having a clevis end portion |96 provided with a pin |91 upon whicha socketed hub portion |98 of the plunger |98 is rotatably mounted, theplunger |98 passing through a spring barrel 99in which is a sliding head|'|4 secured to the plunger '|98 and intersected thereby and Aagainstwhich bears one end of a compression spring |3 whose other end is seatedupon the base of the spring barrel |99'. The plunger |98 is permittedbythe cam 39 to be moved inwardly of the disk ||l|l under the action ofthe spring H3 to engage a slot |9|"'when an indexing movement of thedrum has moved the .axis` of the slot |9I approximately' into alignmentwith the axis of the plunger |98, the roller 54 on the arm 52 beingwithdrawn at sulrstantially the same time from the slot 53" adjacent theslot |9|, thus stopping the indexing movement oi the drum 59 whichalsois secured to the shaft 5| and holding the drum stationary.

Each revolution of thecam shaft 25 effects one withdrawal of thespring-actuated plunger |98 and one engagement of the roller 54 on thearm 52 with a slot 53 of the disk 53 to eiTect a ninety-degree indexingmovement of the vdrum vThe detail whereby the milling cutters 8 aremoved `crosswise in both directions toeffect milling operations upondiametrically opposed portionsof the work pieces I9 comprises, Figures1,

6, 11a, 12,'and13, a cam 35 secured to the camv shaft 25 a spaceddistance from and somewhat exteriorly of the'right-hand side plate'l,togetherl and an outer diametrically enlarged plate or side face of thecam being indicated by 51. The cam plate r5'! is formed with alaterally-directed peripheral extension-51', clearly seen in Figure 1,which defines the groove 39 and whose inner sure l faceconforms to therespectively opposed porripheral recesses,|9|'r the 'axes of eachadjacent u in the' position in which the'secondr and final millingoperation issubstantially completed and the milling cutters 8'are aboutto be moved into their respective central orineutralpositionspreliminarily to a dwell period Within which lan -indexingmovement of the drum 50 through av quadrant will be effected. Using theposition of the roller 31v indicated in Figures 6 and 11a .as a startingpoint, a complete cycle `of operations willnow be described:

- First, a short dwell period during a smallk arc movement of the cam35, indicated by a, Figure lla, then a comparatively rapid movement ofthe milling cutters 8 to central or neutral lpositions relativeV to theadjacent work pieces I0, during an arc movement of the caml 35,indicated `by b, then adwell of the milling cutters 8 at thefcentral orneutral positions for a certain arc movement of the cam 35, indicated byc, while an indexing movement of the drum 5|) is being effected, then acomparatively rapid non-cutting movement of the milling cutters 8transversely in one direction to 4points adjacent the portions upon onevAside'oi` the respective adjacent work pieces Hl which are to be milled,during a certain arc movement ofthe cam 35, indicatedby d, then acomparatively 'slow transverse cutting movement of the milling cutters 8in the same direction to effect the milling operation upon said portionsof the flanges i0 of the work pieces, during 'a certainarc movement ofthe cam 35, indicated by e, then a short dwell period during a small arcmovement of the cam 35, indicated by f, then a comparatively rapidmovement of the milling cutters 8 in the oppositetdirection to positionsadjacent the other side portions of the adjacent work pieces lll whichare to `be milled, through an arc movement of the camk 35, indicated byg, when the roller 31 drops into the groove 36, then a comparativelyslow movement of the milling cutters 8 in they same direction to effectthe second milling operation upon the flanges Ill' of the work piecesI0, through an arc of cam movement indicated by h, at which point acycle has `been completed insofar as a description of all parts thereofis concerned, although, as before stated, this particular describedcycle was commenced at the end of the second milling operation inasmuchas the cam roller 31 in Figures 6 and 11a is shown at that point.

It will be understood that the movements of a milling cutter 8 justdescribed result in any one milling cutter, with the exception of theright and left hand milling cutters of the six milling cutters,effecting one milling operation uponeach of vtwo adjacent work piecesl0, upon the lefthand side of one work piece and the right-hand side ofthe adjacent work piece. This action will be clearly understood from aninspection of Figure 1. One of the end millingcuttersl 8 runs idlyduring each one of these milling periods, the

right-hand end milling cutter 8 in Figure 1 running idly when the otherve cutters are working upon the left-hand sides of the vework piecesIll, and the `left-hand cutter 8 in Figure 1 running idly when the otherfive cutters are working upon the right-hand sides of the work piecesI0.

which is also pivotally connected .the socketedhub |3|` of an upwardlyextending linkA |3|, Figures l, 6, and 13, which at its upper end isthreaded in a socketed hub |3|2 pivotally secured to a socketed `hub|32y by a pin |29y upon which both of hubs |3|2 and |32'are' pivoted andin the latter of which hubs is secured one end of a'rod |32 whose' otherend is secured in a socketed hub |322 pivotally mounted upon a screw |33secured in the rear frame member 9 and the slide backing I4, `the hub|322 forming with a lever extension |36 a rocker arm having a forked end|364. The socketed hub |32 and the rod |32 pass through an openingformed in the righthand frame member I. `The forked end |36 engages abolt |34 secured to and seated in an extended portion I5 of a slide I5,Figure '1, in which the rotatable spindles 1 are mounted. The bolt |34passes through the slide backing I4 formed with any opening |31,lFigures 13a and 14, for the play of thei'bolt |34. The slide I5 has arear dove-tailed sliding portion I5 which engages a complementaryportion |4' formed upon the `inner face of the slide backing I4; Thelatter is secured to a frame member 9 by screws 14 at the rear of thetop portion of the machine immediately to the'rear of the rotatablespindles 1. A gib |6 is provided at the top between the adjacent slidingsurfaces of the members I4 and |5. Thus, due to the contour of theeffective surface formed upon the cam 35, the spindles 1 and hence themilling cutters 3, are traversed transversely of the work pieces in themanner and in the sequence hereinbefore mentioned.

The other portion of the angular rock arm 38, Figure, extends downwardlyand supports a roller |52 rotatably mounted on a pin |50 located at thelower end of the downward extension of this rock arm portion. Adirecting lug |53 extended outwardly from the cam plate 51 tilts therock arm 38 fby means of therollerv |52 and positively forces`downwardly vthe short 'dependent extension 38 of the rock arm 38` and,hence, the roller 31,-sov that the latter is directed into the groove 36during the arcuate cam movement g. The friction of the sliding portion|5| of the slide l5 inthe dove-tailed slideway I4 of the backing |4 issuicient to maintain the roller 31 in intimate contact with theactuating surfaces of the cam 35'ancl to prevent the roller 31 frommoving away fromthese cam surfaces.

Means are provided whereby the work pieces I8 are clamped in the workholders 55 when they are in the mil-ling position. This action iseffected by clamping nger portions |43 of longitudinal rocker arms |43mounted upon atransverse shaft |44, Figures 6, 10, 12, and 17, the rearend body portion of the rocker arms |43 being controlled byrverticallsprings |45` so 4as to cause the clamping fingers |43 normally to beardown upon the flanges ID' of the work pieces I0. Onel end of each spring|46 is secured to an angle |41 mounted upon and extended between theside plates and the other end to the rear end of a rocker arm |43.` Inorder to effect the release of the work pieces I0 from the holdingpressure of the fingers |43', when one bank of work pieces Il) isleaving and the followingbank of work pieces is enteringithemillingstation Bat the top of the drum 50, a cam 40,y Figures 1, 6, .and 12, issecured to the cam shaft 25 adjacently exterior of the milling cam 35and is engaged'by a roller 4| pivotally` mounted upon a pin |54 which iss ecuredin one end portieri 42 of,v a rocker arm,

thel other end portion 42y of which pivotallyk supports a pin 1| 5I.Intermediate'its ends therocker v a link consisting of a socketed hub 59formed with a threaded extension 43 engaged at its' opposite endin-a'tapped hub |53V pivotally secured by a pin |39 to an end portion ofa rockery arm44 pivotally mounted adjacent its opposite end upon `a.transverse shaft |42 to which is secured a series of vrocker cams |45disposed adjacent the bodies lof the respective rocker arms |43 butnormally slightly spaced therefrom. However, when an extended portion 40of the cam 40, Figure 6, isfengaged by the rollerr 4|, the arm 44 isrocked to cause the cams |45 to bear upon the clamping arms |43 to rockthe sameagainst the action of the springs' |46 and thus lift theclamping fingers |43 upwardly awayfrom the anges I0' of thework piecesNormally the cams |45 are held in non-eiective position relative to therocker arms |43 by avtension spring |40 secured at one end to the pin|39. `The other endfof the spring |40 is securedto a pin |4| `mounted inAand projecting fromthe adjacent side frame member The means `forstamping the work pieces |0 with identifying indicia at stationC of therotatabledrum 50 are particularly shown in Figures s, 9, 10,14, 16, and17. The stamping is done by spring-actuated longitudinal plungers 68having rear stem portions68 and provided at their front ends withdiemembers 13. The plungers 68 are slidably mounted in the front plate||0l of a fixedy bed memberk I0, and the stem portions 63' thereof areslidably mounted in the rear plate H02 of the bedkmemberl ||0 and in thevertical leg. ||22 of a longitudinally movable angular member ||2 havinga longitudinal base portion ||2 slidable on inwardly-extending-baseanges H03, Figurevl, of the bed ||0. Compression springs 'l2 aremounted in the bed ||0 around the plunger 'stems 68'fbetween :the rearabutment face of the plunger68 'andthe inside rear faceof vvthe rear bedplate H02. The springs 12 are undercompression whenfthe longitudinallymovable'plungers 68 are inftheir rear position, such as vshown in Figure14, but, when these springs l2 are free to act, they drive the plungers68 rapidly forward to cause the dies 13 to make the desired marking |2,Figures-4 and 8a, upon the Iilianges |0, of the work pieces l0 securedin the Work holders 55 at the station C, Figuresv14 and 16.1"

The means for holding the plungers 68 lin their rearmost position v4andthus keeping the springs 'l2jeompressed is aitransverselylmovable plate65, Figures 8,`9,'14, 16,'andl17 which, in one transverse position, itsright-,hand position as shown in Figure 1,'7, .engages notches `682,Figures Band' '15 formed in the left sider faces of the plungers 68which, in its left-hand position, is disengaged from said notches.|25Figures `15-,and 17, indicates Va free space adjacently forwardly ofthe :front bed'plate ||0' into which the plate 65 canmove-transverselyto its plunger disengagingpositim V'Ihisplate `|55 is formed With en-jlarged 'generally elliptical holes 65,' through whichthe plungers 68canslideexcept when the left-hand v walls of lthe holes `engagethenotches 68.2 of the ,plungers 68 in the right-,hand positionofithegplateB. The rear face of this plate 65 is.

aligned flush .with the front face of the front end 'member ||0 of thebedy ||0 and its front face with the rear faceof a transverse vsupportplate Aand 9, respectively, are driven into or otherwise fastenedin therear bed plate |02 and the front bed plate H0 of the bed member ||0. Akey |55, Figure 9, isfixed in the boreo-f the bushing |23', which key|55 engages-a keyway 22 in the plunger 68.' The bushings |2| and |23provide sliding surfaces for the plunger stems V68 and the plungerbodiesv68. rThe key |55 and the keyway |22 serve to rotatably x theplungers 68 so that the location of the indicia |2 on the work piece I0may be controlled.

The transverselyA movable holding plate 65 is retracted or moved to theleft by a trigger 66, Figures 14, 15, and 16, which is pivotedintermediate its ends on a pin V1| mounted in the support plate |24,Figures 14 and l5. This trigger 66 has an .upper nose portion 66 whichengages the plate 65 adjacent the right-hand end of the latter and thusmoves the plate 65 to the left, as indicated by the space |25, Figuresl5 and 17, against the action of a tension spring 69, when the lowerendv of thegtrigger 66 is engaged by the beveled cam portion 45 providedupon the right-hand face of the worm wheel 46. Such lefthand movement ofthe holding pl'ate 65 releases "the plungers 68 and thus permitsvthemarking operation by the dies '|3 of the plungers 68 under the Iimpulseof the springs l2. The identifying indicia l2 marked onthe flanges i0'.ofthe work pieces I0 byl thefplunger die 13 is indicated in Figures 4,and` 8a.. soon as the camfportion 45passes thetrigger 66, the plate 65is moved tothe rightA by the spring 69 so that the plate 65 canagainengage thenotches 682 and lock the plungers 68 when the latter areretracted. The spring 6 9 yis secured at one end to a pin 10, Figure 15,dependingfrom the base of the plate 65 and at its other endy to a` pin61 secured in the right-handvl frame member V,The retraction of theplungers 68 to permit their being locked and to effect the compressionof the springs 12 is effected from the cam 60, Figures 14, 15, and 18,which is engaged by a roller 6| rotatably mounted on a pin |56 fixed inashortv rearwardly extendingear 62 of an actuating ,lever 62 pivoted atits lower end upon av pin xedly supported on the base 2, which lever.,62 has loose pivotal connection at its upper end' withv a pin 83`securedin opposed ears 98" of a bracket 98 fastened by screws 95 to theunder face ,of the base |2,.of the angular member ||2. As soon as theroller 6| is released from the high point ofthe cam 60, i. e., as soonas the springs 'I2 are fullyvv compressed and the plungers 68 locked bymovement to the right of the plate 65, therlever 62 is pulledforwardlyby a tension springgl5l, Figures 14 and 18, secured at one endbyr a pin ,|58 to the base 2 and at its opposite endv to a pinV |59mounted in the lever 62. action pulls the angular member ||2 forwardlyfrom the position shown in Figure 8 to the position shown in-Figure 14..The plungers 68 are not affected by this last-mentioned movement of themember ||2.

The vplunger stems 68.V are provided at their rear. ends with xedabutments |60 which, however, ycan be adjustably fixed by means ofthenuts 84, againstwhich abutments |60 the upright This portion H22 of theangular member ||2 presses when the plungers 58 are being retracted -tovcompress 'the springs 12.l As before stated, the base l Figure 8, is ashowing of the respective positions i.

of the several elements when the plungers 68 are fully retracted butbelore the angular memb er l l2 moves forwardly to the position shown inFigure 14 in the manner hereinbeiore mentioned.

Thus, as soon as the high portion of the cam 60 has completely passedthe roller 5|, the pivoted lever 62 and, hence, the `angular member ||2,is pulled forwardly by the spring |51 and the several elements assumethe respective positions shown in Figure 14; whereas, as stated, thecom'- plete rearward movement of the member ||2 is sho-wn in Figure 8.The abutments |60 are so adjusted that the stroke of the plungers 68during their marking action does not cause the abutments |60 to contactthe portion H22 of the member H2, during such `marking movement, asindicated by the space 85, Figure 16, which view is a showing of thepositions of the several elements at the time of marking.

The ejecting of the milled and marked work l pieces ill, while the drum55 is making its third indexing movement, between the stations C and D,Figure 14, is effected by a cylindrical tube 28 which rolls freelywithin the `'chamber of :the drum 50` and tendsv to staybn the bottom ofAthe drum v5|), by gravity as the latter rotates. Inasmuch as theinnerends of the knock-out pins 3| extend into this drum chamber andarefreely movable through the work-'plate extension holes 56 andvtheirhanged ends can engage the inner ends of the work pieces |'0 within Ithevextended portions of the work *holdersv 525, the -Weightof the tube 28moves the knock-out pins 3 I against the inner ends of the work pieceand ejects them from the work lholders 55 and outwardly of .1

the drum 50 whence they are directed by a guard or chute 34' outwardlyloi' the machine, Figure 14.

In orde-r that the surfaces of the work holders 55 may be lkep-t clearof chipsgrit or other obstructions, an upwardly-extended flexible brush29, Figure 14, seated at itsl base in a transversely extended framemember 48 plays atits upper end over these work holder surfaces as thedrum 50 isrotated.

The transversely movable slide in which the rotatable spindles 1v aremounted is a multiplepart `member consisting of the main slide portion|5 'and the plurality of spindle housings I1,.Fg ure 7 which are alignedwith the main slide portion by keys I8. Furthermore, the spindlehousings. |1f are secured toi the slide portion |5 by bo'lts Hl whichpass through adjacent contacting. portions of the. annular housings I1and are threaded inthe main slide portion l5, Figures. 1 and 14.`Surrour-idii'lgthe upper stemrportionsoi the spindles 'l arecompression springs-22 which bear attheir lower ends against lowerenlarged sliding abutment portions =23 of the spindles- 1 and' at. theiruppery ends against rl'xed ball races 24. These ball races 24 are'Xediby threaded 'collars `26 which` engage upwardly/-iitendingvilar'iges" 1 of" thespindlehousings I1. Sleeve 'liners orbushin'gs39are provided for the enlarged spindle abutmentfmember's 23;as also, oil seals 49.' f j l.

t Certain adjustments of :the machine elements areprovidedas follows.:

The transverse strokes of the rotatable spindles 1. may be varied byadjustments of the link |3I andthemod |32 which, it will be noted, areof turnbuckle construction 1 by vreason of their threaded ,engagementatleast at one of their two ends with ythe socketed hubmembers |3IT andI3!2 andsocketed hub members |32 and |322, re-

spectively, Figures 6 and 13. The stroke of the holding-nger-releasingcams |45 can be varied by-an adjustment of the .link 43 which hasscrewthreaded engagement at least at one of its two ends .with thesocketed. hub members 59 and 63. The,dep'th of the milling cuts can bevaried by adjustments of `the nuts 21, 21 engaging the tops of thespindles 1 and bearing upon the hubs of the sprockets '92 or gears 93. v

Claims tothe milling machine combination disclosed vin the instantapplication are presented in applicants pending application upon MillinginechanismsjSerial No. 542,412.

Claims to the combination of means for lmarkingairietal shape disclosedin the instant applicationare presented vin applicants pendingapplication upon Work-marking assemblies for machine tools,`Serial No,542,413,

What Ijclaim is:

`i. `Afmilling and markingfmachine having a fram-ea rotatable millingspindle mounted thereinfor slidingmovement, means for rotating thespindle, means ffor imparting periodic sliding movements to the spindle,a drum rotatably mounted in the'frame, radially spaced workholdersmounted fon the 'drummeans for imp arting periodiefrotating. 'indexingl'movements to the drum; work-marking means effective adjacent to theworkeho'lders, the assembly being. such as, by the rotation oi thetoibring: the workhold ers; lsucoessively adjacent a dwell position ofthe drumv for loading, another dwell position of the drum for milling,and still another position of the drum fory marking, means' for .holdingthe drum from rotating, means -for periodically rendering the'holdingmeans ineiifective, gravity-actuated means rendered eiiective by therotation of the druid-for ejecting work from thev holders during therotation o-f rthe drum, .and means for coordizia-ting iin timed relation.the functions of the spindle-.sliding means, lthe indexing means, thedrumf-'hold'ing means, the means for rendering the holding` meansineffective, `and the marking means.

' 2.7'A milling 'andma'rking machine having a frame, a plurality of. 1laterally spaced milling spindles mounted 'in thelram'e as a single unitfor vslidingmovement,' Vmeans for rotating th'e spindles, means 'forimparting vperiodic sliding movements 'tothe spindle unit, "a drumrotatably mounted in the `f rame, 'means for imparting periodio rotatingindexing movements l:to the drum, radially spacedy work-holders mountedon the drum,'eachworl-holder comprising a plurality of laterally spacedworki-holdingfparts'theassemblyy being such-ais, by the rotation of vthedrum, lio.` bringfthe workmolders successively adjacent tothe'pathiorsliding'movement of ytheisp'indle unit, means iior "holdingthe fdrunr trom rotatingmeans for periodically rendering theholding-means ineieetive, worksinarki-ng'means effective f'adjacent thework-holders at `one dwell position of `the drum, the spindle-slidingmeans functioning, at times, to move the respective spindles betweendwell positions, which are intermediate adjacent work-holding parts, andmilling positions contigi ing means, thev drum-holding means, the meanskfor rendering the holding means ineffective, and

the marking means.

3.4 A milling and marking machine having a frame, a milling blockmounted therein for slid-V ing movement, a rotatable spindle mounted inthe block, means for rotating the spindle, a shaft rotatably mounted inth'e frame, means for rotating the shaft, a cam secured to the shaft andconnections actuated by the cam and secured to the spindle block forsli-ding the Latter, .the cam structure being such that the block isactuated through a series of differential sliding movements alternatedwith dwells, a second shaft rotatably mounted in the frame, an indexingdrum secured to th'e second shaft, a radially spaced series of pairs oftransversely spaced work-holders mounted on theI drum, clamping fingersand means normally rendering the same effective on the work holders at adwell position of the drum, a second cam secured to the first-mentionedshaft, means actuated by the second cam and periodically rendering thevclamping fingers ineffective as the work-holders enter and leavesaiddwell position of the drum, means normally holding the drumstationary, a third caml secured to th'e first-mentioned shaft and meansactuated thereby rendering the drum-holding means ineffective, meanssecured to the first-mentioned shaft and periodically engaging ythe drumto index th'e latter when the drum-holding means are ineffective,workment, a release of the clamping fingers, a clamping of the fingersand a milling dwell, a release of the clamping fingers, an indexingmovement, a, marking dwell, an indexing movement, an idle dwell, and anindexing movement, and gravityactuated means rendered effectivev by therotation of the drum and' knock-out means actuated by saidgravity-actuated meansv for ejecting work from the work-holders duringthe two last-mentioned indexing movements and the idle dwell.

4. A work-holder and work-ejecting means comprising a rrotatable drumhaving a work-receiving opening through the peripheral bodyy thereof, a,work-holding plate mounted on the` peripheral surface of the drum andhaving a work-receiving opening aligned with the drum opening, knock-outmeans mounted in the opening `of the work-holding plate, movable axiallyceiving opening through th'e peripheral body dwell position of the drum,a compression spring tending to cause th'e work-marking means to impingeupon a work-h-older at said second dwell position, a fourth camsecuredtothe rst-menn tioned shaft;v and means actuated thereby to render thework-marking holding means ineffective,

a fifth cam secured to the first-mentioned shaft for retractingthefwork-markng means against x to, all being coordinated in timedrelation to effect the following actions in succession relative to anyone pair of .transversely spaced work-holders, a loading dwell of thedrum, an indexing movethereof, knock-out means extended into the druminterior, means mounted on the drum for movably supporting the knock-outmeans in alignment with the work-receiving opening, and a member in thedrum free to tumble by gravity against the extended portion of theknock-out means.

6. A work-holder and work-ejecting means comprising a rotatable drumhaving a work-receiving opening .through the peripheral body thereof,knock-out means extended into the drum interior, means mounted on thedrum for movably supporting the knock-out means in alignment with andadjacently interior of the workreceiving opening, and gravity-actuatedmeans disposed in thedrum'interior and intersecting the path of movementof the knock-out means.

7. A work-holder and work-ejecting means comprising a rotatable drum`having a work-receiving opening through' the peripheral body thereof, aWork-holding member seated in said work-receiving opening, extended intothe drum I interior, having a flange mounted on the drum -body,'andprovided with an Iouter open-'ended work-receiving chamber, a knockoutpin movably Y mounted in the extended portion of said member,

having an outer end portion extended into said chamber, andhaving aninner end portion extended into the drum interior, and a tube disposedWithin the drum and free to roll therein by gravity'. l

ERIC T. NORD.

